Results 31 to 40 of about 43,102 (287)

Pro- and Anti-oxidant Properties of Redox-Active Catechol-Chitosan Films

open access: yesFrontiers in Chemistry, 2019
Catechols are abundant in nature and are believed to perform diverse biological functions that include photoprotection (e.g., melanins), molecular signaling (e.g., catecholamine neurotransmitters), and mechanical adhesion (e.g., mussel glue).
Eunkyoung Kim   +7 more
doaj   +1 more source

Mussel‐Inspired Polyglycerol Coatings for Surface Modification with Tunable Architecture

open access: yesAdvanced Materials Interfaces, 2023
Mussel‐inspired coatings, known for their outstanding substrate‐independent adhesive capabilities, have numerous potential applications in materials science and biomedical fields.
Peng Tang   +5 more
doaj   +1 more source

Electrooxidation of Catechols in the Presence of Sulfite: Presentation of a Facile and Green Method for Aromatic Sulfonation

open access: yesInternational Journal of Electrochemical Science, 2007
Electrochemical oxidation of catechols (1a-e) has been studied in the presence of sulfite ion (3) as nucleophile in aqueous solution, using cyclic voltammetry and controlled-potential coulometry. The results indicate the participation of catechols (1a-e)
D. Nematollahi, E. Tammari, H. Karbasi
doaj   +1 more source

From catechol‐tocopherol to catechol‐hydroquinone polyphenolic antioxidant hybrids

open access: yesHeteroatom Chemistry, 2018
AbstractMultidefence antioxidants represent a valuable solution for the protection against oxidative stress. From the planned synthesis of a catechol‐tocopherol hybrid, we isolated a catechol‐hydroquinone hybrid through a BBr3‐mediated benzochromene‐fluoren‐1‐ol transposition.
Caterina Viglianisi   +4 more
openaire   +2 more sources

Digital Simulation of the Cyclic Voltammetric Study of the Catechols Electrooxidation in the Presence of Thiourea

open access: yesInternational Journal of Electrochemical Science, 2011
The present work explains the electrochemical behavior of catechols in the presence of thiourea as a nucleophile in aqueous solution, by means of cyclic voltammetry and controlled-potential coulometry.
Bahram Dowlati   +2 more
doaj   +1 more source

Polyphenol-Hydroxylating Tyrosinase Activity under Acidic pH Enables Efficient Synthesis of Plant Catechols and Gallols

open access: yesMicroorganisms, 2021
Tyrosinase is generally known as a melanin-forming enzyme, facilitating monooxygenation of phenols, oxidation of catechols into quinones, and finally generating biological melanin.
Hanbit Song   +6 more
doaj   +1 more source

A widely distributed metalloenzyme class enables gut microbial metabolism of host- and diet-derived catechols

open access: yesbioRxiv, 2019
Catechol dehydroxylation is a central chemical transformation in the gut microbial metabolism of plant- and host-derived small molecules. However, the molecular basis for this transformation and its distribution among gut microorganisms are poorly ...
V. M. Rekdal   +6 more
semanticscholar   +1 more source

Boronate Derivatives of Functionally Diverse Catechols: Stability Studies

open access: yesMolecules, 2010
Benzeneboronate of catecholic carboxyl methyl esters, N-acetyldopamine, coumarin and catechol estrogens were prepared as crystalline derivatives in high yield.
Kamal Aziz Ketuly, A. Hamid A. Hadi
doaj   +1 more source

An Experimental Validated Computational Method for pKa Determination of Substituted 1,2-Dihydroxybenzenes

open access: yesFrontiers in Chemistry, 2018
1,2-dihydroxybenzenes (DHBs) are organic compounds which are widely studied as they are applied to advanced oxidation processes (AOPs). These compounds are also related to the development of oxidative stress, wood biodegradation, and neuronal disease in ...
Romina Romero   +5 more
doaj   +1 more source

Regioselective para‐Carboxylation of Catechols with a Prenylated Flavin Dependent Decarboxylase

open access: yesAngewandte Chemie, 2017
The utilization of CO2 as a carbon source for organic synthesis meets the urgent demand for more sustainability in the production of chemicals. Herein, we report on the enzyme‐catalyzed para‐carboxylation of catechols, employing 3,4‐dihydroxybenzoic acid
Stefan E. Payer   +18 more
semanticscholar   +1 more source

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